One To Two Car Charging Bluetooth 5.0 FM Transmitter for Car Bluetooth Car Adapter with USB Charging Car Charger MP3 Player Hands Calling Product parameters: Product type: car Bluetooth player Frequency response: 20HZ-15khz FM transmission frequency: 87.5~108.0Mhz Bluetooth version: 5.0 Transmission distance: 5-10m Working voltage: 12V-24V Music format: MP3/WAV Package size:13X6.8X4.9cm/5.12x2.68x1.89inch Gross weight: 51g/0.11lb Feature: USB fast charging: compatible with a variety of charging protocols, USB interfaces can be charged at the same time, up to 3.1A, and smart shunt technology can quickly charge without harming the phone. Advanced Bluetooth 5.0 technology: The built-in Bluetooth 5.0 chip provides a stable connection for playing music and making handsfree calls through FM frequencies, allowing faster pairing with compatible devices, and the built-in microphone can easily end calls with button. No need to hold the phone. This hands- call car accessory makes your driving safer. More auxiliary playing modes: plug and play, lossless audio quality, power off memory support, USB disk compatibili-ty , multiple playing modes. Navigation voice broadcast: mobile navigation broadcast, built-in microphone, supports smart voice navigation of mobile phones, and its accuracy is the sound of various mobile phone applications. button operation: This product is equipped with a button, built-in microphone, clear and conversation, button hands-, and safer driving. The Package Include: 1x Car Bluetooth player Charger:Bluetooth car mp3 player charger Multi-function car fm transmitter car charging fast charge Intelligent Fast Charge:Fast charging,automatically adapt to mobile phones to keep the same charging effect as the fast charger. Multi-Purpose Adaptation:Compatibles with all kinds of digital devices, USB intelligent adaptive function module, intelligent adaptation of all kinds of mobile phones, tablets, dashcam, camera, game console, GPS, electronic dog. Aperture ambient light:Small does not take up space, compartment aperture atmospheres light is convenient to find at night, two charging point interface design, charging without waiting. Multi- Safeties protection:Over chargeprotection, over current protection, over power protection, over voltage protection, over current protection, output protection, high temperature protection, short circuit protection.